Promax OD-405, Manual, Page: 178 / 218

USER’S MANUAL. OD-405/410B/411/415
11-2011 Page 62
To activate it manually:
1. Press the Horizontal menu key.
2. Press Roll . The horizontal scale automatically becomes 50ms/div
and the waveform starts scrolling from the right side of the display
When the Roll mode is activated, an indicator appears at the bottom of
the display.
5.6.4.4 Zooming the waveform horizontally
Procedure
1. Press the Horizontal Menu key.
2. Press Window.
3. Use the horizontal position knob to move the zoom range sideways,
and TIME/DIV knob to change the zoom range width.
The width of the bar in the middle of the display is the actual zoomed
area.
Zoom range: 1ns ~ 25s
Example:
Figure 20.-